Safety razor



April 1, 1952 J. MUROS 2,591,280

SAFETY RAZOR Filed Oct. 29, 1949 4 Sheets-Sheet l Zim/692303".

April 1, 1952 J. MUROS 2,591,280)

SAFETY RAZOR Filed Oct. 29, 1949 4 Sheets-Sheet 2 i4 5 23 f5 /2 l l,

/ t l l April 1, 1952 Filed 02?.. 29. 3.949

J. MUROS SAFETY RAZOR 4 Sheets-Sheet 5 INVENTOR.

April 1, '1952 J. MUROS 2,591,280

SAFETY RAZOR Filed Oct. 29, 1949 I 4 Sheets-Sheet 4 Patented Apr. 1, 1952 SAFETY RAZOR Joseph Muros, Newtonville, Mass., assignor to Gillette Safety Razor Company, Boston, Mass., a corporation of Delaware Application October 29, 1949, Serial No. 124,294

Claims. (Cl. 3062) 'Ihis invention relates to safety razors of the type which employ a thin removable and replaceable blade. In one aspect it comprises a safety razor of new and improved construction that may be manufactured economically by mass production methods, that is convenient in manipulation by the user and accurate and reliable in properly positioning the blade for shaving. The razor moreover is characterized by sound mechanical structure wherein the parts which are movable are guided for free movement without binding and are securely held at rest in operative position during the shaving operation.

Going more into detail, the razor of this inventlon in its preferred form comprises a stationaryguard member having corner lugs, a cap member movable transversely upon the guard member and having a longitudinal blade-locating ilange, together with a tongue and slot guiding connection. The blade is engaged and advanced by pressure against its entire rear edge and is guided by connections disposed symmetrically and centrally between the blade-locating lugs of the guard. In this way, free non-binding movement of the cap is insured as well as balanced Y pressure holding the blade in its shaving position.

These and other features and advantages of the invention will be best understood and appreciated from the following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings, in which:

Fig. l is a View of the razor in side elevation and on an enlarged scale;

Fig. 2 is a fragmentary view in front elevation;

Fig. 3 is a plan view;

Fig. 4 is a fragmentary view in longitudinal section on a still larger scale on line y4--II of Fig. 2;

Fig. 5 is a fragmentary view in section view on the line 5-5 of Fig. 4;

Figs. 6 and '7 are plan views of the razor head showing certain portions broken away;

Fig. 8 is a view in perspective showing the parts the pilot of the magazine as will presently be described.

A rectangular guard or blade seat member I5 is secured to the upper face of the base plate I3 and for that purpose is herein shown as provided wit'n countersunk holes for screws 20 although any other securing medium could be employed. The guard member is provided with a longitudinal channel I6 near its front edge which in the complete razor underlies the shaving edge of the blade. At each end of the channel is formed an upstanding lug I1 located in position to engage the opposite ends of the blade edge and position the blade properly for shaving. The forward edge of the guard member is formed as a serrated guard bar I8 and in the rear under face of the guard member is formed a recess or chamber I9 which serves as a transverse guideway for the part 26 to be described below.

Cooperating with the guard member is a cap 22 which is also rectangular in contour and of the same length as the guard member. The cap is provided with a downwardly extending longitudinal ilange 23 at its rear edge and with a wide shallow channel 24 in its under face adjacent to the flange 23. The ange 23 is also provided in its outer face with a recess 25 which in the assembled razor is disposed in registration with the chamber I9 of the guard member. The recess 25 is shaped to receive the vertical flange of an angle piece 26 having a horizontal arm shaped to fit as a tongue into the guideway provided by the chamber I9 of the guard member and this arm or tongue is perforated by a longitudinal slot 2l as shown in Figs. 6-8. The angle piece is rigidly secured to the back of the cap by screws shown in Fig. 8 and constitutes in effect a portion of the cap. It constitutes with the chamber or guideway I9 of the guard a tongue and groove guiding connection between the cap and guard members of the razor.

A dished rectangular spring plate 28 is shaped to lt the chamber I9 of the guard member and is provided with a square aperture 29 for the passage of a leaf spring 3| carried by a cylindrical plug 30 which is seated in a bore in the upper end of the handle II). By engaging the horizontal arm of the angle piece 26 the spring plate 28 holds the cap down rmly butyieldingly upon a blade interposed between the cap and guard members of the razor.

The lchamber I9 is countersunk to provide a deeper recess I9' for the reception of the upper end of the spring 3| and a shallow wall I9 exis not restricted to blades of the specific type shown but by suitable modification it may be adapted for use of blades of other shape, all Within the scope of the invention.

From the foregoing description it will be apparent that the angle piece 26 serves to retain the cap 20 in position upon the guard member I5` while permitting it to move transversely thereon. The spring 3| passes upwardly through the slot 2'I in the angle piece 26 and through the aperture 29 in the spring plate 28. The'spring is bent forwardly so that it tends at all times to move the cap forwardly although it permits rearward displacement of the cap against the spring tension. The spring 3I, being nat, is held against twisting by the straight slot 21 of the angle piece and'so prevents twisting of the plug 30. The blade 32 rests upon the blade seat of thev guard lwith its unsharpened rear edge in contact with the downwardly extending flange 23 of the cap. Accordingly the yielding forward movement of the capA tends always to advance the blade 22 until the latter is arrested by the engagement of its: corners with the lugs I1 which are integral parts of the stationary guard member.

When it is desired tov insert a fresh blade in the razor or to remove a used blade, the cap 22 is forced rearwardly `against the spring tension so that vpressure of the blade against the lugs I'I` is released and thus the blade is permitted to be moved upon the surface of the blade seat. Immediately upon the removal of such force the spring blade 3I automatically advances the cap 22 and re-establishes the proper shaving relation of the razor parts.

The cap 22 may be displaced by hand, or as suggested in Figs. 6 and '7, it may be displaced by the pilot 33 of a blade magazine 34. As herein shown the pilot 33 takes the form of a flat blade having a base portion of width to ll recess I4 of base plate I3 and a tapering end shaped vto engagethe spring blade 3l and force the latter toward the rear of the razor head as the pilot is advanced. When the pilot is fully inserted as shown in-Fig. 7 the-spring blade 3l Vtogether' with the cap 22 have been displaced to their extreme rearward. position and with them they Ycarry the blade 32 so that its cutting edge is now withdrawn from the lugs I 1 as Wellshown in Fig. 7. The blade may now be ejected under yielding pressure from the outer end of the razor head and immediately replaced by a fresh blade delivered from the magazinev 34. It will be noted that the part of the pilot 33 in the recess I4 is entirely below and shielded by a substantial thickness of metal from the blade seat so that it interferes in no way with the endwise movement of the blade.

The parts of the razor as herein shown are designed' so that, except the blade and spring parts, they may be readily manufactured as die castings at very moderate expense. It will be seen` also that the dished spring 28 is effective to take up any manufacturing variation in the thickness of the cap and to insure adequate frictional grip on the blade under all conditions. Further, the cap and guard members are so re'- lated that any substantial twisting is positively prevented at all times and thus there is no danger of bending the tongue. of the angle piece 26 which rcontrols the transverse movement of the cap.

Having thus disclosed my invention and described in detail an illustrative embodiment thereof, I claim as new and desire to secure by Letters Patent:

1. A safety razor comprising a base plate having a longitudinal passage therein, a bladesupporting member attached thereto and having blade-locating lugs at one edge and a recess in the other, a cap member slidably engaged with the blade-supporting member, an angle piece fast to said cap member and extending forwardly into the recess in the blade-supporting member, and a spring extending through the passage of the base plate and arranged to bias the capmember toward the lugs'of the blade- Supporting member.

2'. A safety razor of the character described in claim 1 further characterized by a dished spring plate interposed between the said angle ,piece and the blade-supporting member and being operative to hold the cap member in yielding contact with the blade-supporting member.

3. A safety razor comprising a stationary guard member having. Iblade locating corner lugs, a cap member movable transversely upon Vthe guard member and having a longitudinal bladelocating flange, spring means for moving the cap forwardly in the razor, a spring holding the cap down upon a blade interposedV between it and the lguard member, and a tongue and groove guiding connection disposed at the center of the cap and guard members and provided by parts of the said members.

4. A safety razor comprising a handle having a longitudinal bore, a blade-supporting member connected to the handle and having blade-locating lugs on its upper face and a recess in its lower face, a cap membertransversely movable on the blade-supporting memberand having a rigid arm extending into said recess and provided with. a slot, a plug in the bore of the handle, and a spring blade carried by the plug, passing through the slot of said arm and acting to urge the cap toward. the said lugs.

5. A safety razor comprising cooperating cap and guard members having portions providing a connecting tongue and slot Yconnection permitting relative transverse movement, and spring means pressing on an element of said connection for urging said members into yielding engagement with an interposed blade.

6. A safety razor comprising cooperating cap and guard members, a tongue and slot connection including a tongue projecting from the cap and a guideway inthe guard member, a spring acting on said tongue for urging the two members toward each other, and a second spring also acting on the tongue for moving the cap into blade-locating position.V

'7. A safety razor having cooperating cap and guard members connected for transverse bladelocating movement, the guard having Va recess therein, a handle connected to the guard' and having a bore therein, and a spring seated in said bore, passing into the recess of the guard and acting to move the cap into blade-locating position thereon.

8. A safety razor having cooperating cap and guard members connected for transverse bladelocating movement, the guard having a recessed guideway in its under face and the cap having a slotted arm movable therein, an apertured spring in said guideway engaging said arm, and a spring. blade passing through both the slotted arm and the apertured spring and acting on the former to cause the cap to position the blade for shaving.

9. A safety razor having inter-connected cap and' guard members, a slotted arm being in eluded in the connection betweenhthe members, a handle fast to the guard and having a cylindrical bore therein, a plug seated in the bore, and a spring blade carried by the plug and held against twisting by passing through the slot oi said arm and acting therethrough relatively to move the cap and guard members.

10. A safety razor having a 4.guard member withan upper face providing ablade seat and a longitudinal channel in its lower face separated from the blade seat by the body of the guard,A a cap member having an extension shaped to underlie said channel, a dished spring located in the channel and yieldingly engaged with the guard and said extension, and an element passing through the spring at substantially right angles in position to be engaged by 10 a magazine pilot inserted into the channel.

AJOSEPH MUROS.

No references cited. 

